Loctite is used to help eliminate the vibrational loosening of mechanical fasteners, a frequent cause of machine failure.
See Loctite Types for more details on which applications to use Loctite. The following Loctite can be ordered online.
Additional assistance when removing hardware with Loctite already applied
Note: Some hardware has nylon patches (image below) not thread lockers (Loctite). Thread lockers actually bond the nut to bolt, the nylon patch takes up “Space” and does not bond the nut to the fastener